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4

The resolved part of the resultant of two forces inclined at an angle θ in a given direction is equal to

A. The algebraic sum of the resolved parts of the forces in the given direction

B. The sum of the resolved parts of the forces in the given direction

C. The difference of the forces multiplied by the cosine of θ

D. The sum of the forces multiplied by the sine of θ

Correct Answer :

A. The algebraic sum of the resolved parts of the forces in the given direction


Related Questions

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4

The slope on the road surface generally provided on the curves is known as

A. Angle of friction

B. Angle of repose

C. Angle of banking

D. None of these

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4

The law of motion involved in the recoil of gun is

A. Newton's first law of motion

B. Newton's second law of motion

C. Newton's third law of motion

D. None of these

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4

The velocity ratio of a single purchase crab winch can be increased by

A. Increasing the length of the handle

B. Increasing the radius of the load drum

C. Increasing the number of teeth of the pinion

D. All of the above

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4

The unit of angular acceleration is

A. N-m

B. m/s

C. m/s2

D. rad/s2

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4

When a body of mass m attains a velocity v from rest in time t, then the kinetic energy of translation is

A. mv2

B. mgv2

C. 0.5 mv2

D. 0.5 mgv2

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4

The law of the machine is (where P = Effort applied to lift the load, m = A constant which is equal to the slope of the line, W = Load lifted, and C = Another constant which represents the machine friction.)

A. P = mW - C

B. P = m/W + C

C. P = mW + C

D. P = C - mW

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4

When trying to turn a key into a lock, following is applied

A. Coplanar force

B. Non-coplanar forces

C. Moment

D. Couple

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4

The resultant of two forces P and Q acting at an angle θ is

A. √(P² + Q² + 2PQ sinθ)

B. √(P² + Q² + 2PQ cosθ)

C. √(P² + Q² - 2PQ cosθ)

D. √(P² + Q² - 2PQ tanθ)

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4

The velocity ratio for the third system of pulleys is

A. n

B.

C. 2n

D. 2n - 1

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4

Which of the following are vector quantities?

A. Angular displacement

B. Angular velocity

C. Angular acceleration

D. All of these

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4

Varingon's theorem of moments states that if a number of coplanar forces acting on a particle are in equilibrium, then

A. Their algebraic sum is zero

B. Their lines of action are at equal distances

C. The algebraic sum of their moments about any point in their plane is zero

D. The algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point.

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4

The maximum velocity of a particle moving with simple harmonic motion is

A. ω

B. ωr

C. ω2r

D. ω/r

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4

The equivalent length of a simple pendulum which gives the same frequency as compound pendulum is

A. h/(kG² + h²)

B. (kG² + h²)/h

C. h²/(kG² + h²)

D. (kG² + h²)/h²

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4

In order to double the period of simple pendulum, the length of the string should be

A. Halved

B. Doubled

C. Quadrupled

D. None of these

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4

Moment of inertia is the

A. Second moment of force

B. Second moment of area

C. Second moment of mass

D. All of these

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4

Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one

A. Ellipse

B. Hyperbola

C. Parabola

D. Circle

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4

A force acting on a body may

A. Change its motion

B. Balance the other forces acting on it

C. Retard its motion

D. All of the above

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4

The angle between two forces when the resultant is maximum and minimum respectively are:

A. 0° and 180°

B. 180° and 0°

C. 90° and 180°

D. 90° and 0°

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4

When the spring of a watch is wound, it will possess

A. Strain energy

B. Kinetic energy

C. Heat energy

D. Electrical energy

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4

Two like parallel forces are acting at a distance of 24 mm apart and their resultant is 20 N. It the line of action of the resultant is 6 mm from any given force, the two forces are

A. 15 N and 5 N

B. 20 N and 5 N

C. 15 N and 15 N

D. None of these

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4

If n = number of members and y = number of joints, then for a perfect frame, n = ?

A. 1/2

B. 2/3

C. 3/2

D. 2/4

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4

The moment of the force P about O as shown in the below figure is

A. P × OA

B. P × OB

C. P × OC

D. P × AC

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4

A framed structure is imperfect, if the numbers of members are __________ (2j - 3).

A. Equal to

B. Less than

C. Greater than

D. Either (B) or (C)

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4

If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

A. 30°

B. 60°

C. 90°

D. 120°

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4

The weight of a body is due to

A. Gravitational pull exerted by the earth

B. Forces experienced by body in atmosphere

C. Force of attraction experienced by particles

D. Gravitational force of attraction towards the centre of the earth

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4

The coefficient of restitution for inelastic bodies is

A. Zero

B. One

C. Between zero and one

D. More than one

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4

If the masses of both the bodies, as shown in the below figure, are doubled, then the acceleration in the string will be

A. Same

B. Half

C. Double

D. None of these

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4

The unit of angular velocity is

A. m/min

B. rad/s

C. Revolutions/min

D. Both (B) and (C)

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4

Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is

A. bh3/4

B. bh3/8

C. bh3/12

D. bh3/36

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4

The centre of gravity of a triangle lies at the point of

A. Concurrence of the medians

B. Intersection of its altitudes

C. Intersection of bisector of angles

D. Intersection of diagonals